Depression is a serious diagnosis that can have severe consequences; it is not just experiencing "the blues" or having sad feelings that most people get from time to time. People who are diagnosed with depression have overwhelming feelings of sadness that are present for at least two weeks. In addition, they also experience symptoms such as changes in their appetite or sleep patterns, feelings of guilt or worthlessness, lack of energy or motivation, and even thoughts of suicide. People with depression have difficulty functioning in many areas of their lives, including at work, at school, and in social relationships. Those who have this diagnosis often need medication, therapy, or a combination of both to relieve their symptoms and regain their usual functioning.